<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>css样式表</title>
		<style>
			h3{
				color: aqua;
			}
		</style>
	</head>
	<body>
	
		<h3 style="font-size: 30px;">这是标题</h3>
		<h3>这是标题</h3>
		<h3>这是标题</h3>
		<p>这是段落</p>
		<p>这是段落</p>
		<p>这是段落</p>
		<h3>这是标题</h3>
		<h3>这是标题</h3>
		<h3>这是标题</h3>
		<p>这是段落</p>
		<p>这是段落</p>
		<p>这是段落</p>
		
		
		
	</body>
</html>